diff --git a/lldb/include/lldb/Interpreter/OptionGroupFormat.h b/lldb/include/lldb/Interpreter/OptionGroupFormat.h
--- a/lldb/include/lldb/Interpreter/OptionGroupFormat.h
+++ b/lldb/include/lldb/Interpreter/OptionGroupFormat.h
@@ -53,6 +53,8 @@
 
   const OptionValueFormat &GetFormatValue() const { return m_format; }
 
+  bool FormatWasSet() const { return m_format.OptionWasSet(); }
+
   OptionValueUInt64 &GetByteSizeValue() { return m_byte_size; }
 
   const OptionValueUInt64 &GetByteSizeValue() const { return m_byte_size; }
diff --git a/lldb/source/Commands/CommandObjectRegister.cpp b/lldb/source/Commands/CommandObjectRegister.cpp
--- a/lldb/source/Commands/CommandObjectRegister.cpp
+++ b/lldb/source/Commands/CommandObjectRegister.cpp
@@ -44,7 +44,10 @@
             nullptr,
             eCommandRequiresFrame | eCommandRequiresRegContext |
                 eCommandProcessMustBeLaunched | eCommandProcessMustBePaused),
-        m_format_options(eFormatDefault) {
+        m_format_options(eFormatDefault, UINT64_MAX, UINT64_MAX,
+                         {{CommandArgumentType::eArgTypeFormat,
+                           "Specify a format to be used for display. If this "
+                           "is set, register fields will not be dispayed."}}) {
     CommandArgumentEntry arg;
     CommandArgumentData register_arg;
 
@@ -215,8 +218,11 @@
 
           if (const RegisterInfo *reg_info =
                   reg_ctx->GetRegisterInfoByName(arg_str)) {
+            // If they have asked for a specific format don't obscure that by
+            // printing flags afterwards.
+            bool print_flags = !m_format_options.FormatWasSet();
             if (!DumpRegister(m_exe_ctx, strm, *reg_ctx, *reg_info,
-                              /*print_flags=*/true))
+                              print_flags))
               strm.Printf("%-12s = error: unavailable\n", reg_info->name);
           } else {
             result.AppendErrorWithFormat("Invalid register name '%s'.\n",
diff --git a/lldb/test/API/functionalities/gdb_remote_client/TestXMLRegisterFlags.py b/lldb/test/API/functionalities/gdb_remote_client/TestXMLRegisterFlags.py
--- a/lldb/test/API/functionalities/gdb_remote_client/TestXMLRegisterFlags.py
+++ b/lldb/test/API/functionalities/gdb_remote_client/TestXMLRegisterFlags.py
@@ -410,6 +410,15 @@
 
         self.expect("register read cpsr", substrs=["= (field_2 = 1, field_1 = 1, ...)"])
 
+    @skipIfXmlSupportMissing
+    @skipIfRemote
+    def test_format_disables_flags(self):
+        # If asked for a specific format, don't print flags after it.
+        self.setup_flags_test('<field name="field_0" start="0" end="0"/>')
+
+        self.expect("register read cpsr --format X", substrs=["cpsr = 0xEEEE7777"])
+        self.expect("register read cpsr --format X", substrs=["field_0"], matching=False)
+
     @skipIfXmlSupportMissing
     @skipIfRemote
     def test_xml_includes(self):